Attachment of dental manikin-heads to the patients&#39; head-rests of dental chairs.



F. D. WE ISSE. v ATTACHMENT 0F DENTAL MANIKIN HEADS TO THE PATIENTS HEAD RESTS 0F DENTAL CHAIRS.

APPLICATION FILED JUNE 18. l9l3- 1 15,087. Patented Feb. 6, 1917.

Fahd FANT rannuinn. WEISSE, or new YORK, n. Y., assrcnvon r0 :onurar. iaanimu HEAD co. Ind, a CORPORATION or NEW YORK.

ATTACHMENT OF DENT-AL MANIKIN-HEADS TO THE PATIENTS HEAD-REEVES OF DENTAL CHAIRS.

Patented Feb. 6, fault.

Original application filed October 1, 1912, Serial No. 723,726. Divided and this application filed .Tune 18,

To all whom it may concern:

Be it known that I, Fnnnorn D. Wnrssn, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented Improve-.

ments in the Attachment of Dental Manikin-Heads to the Patients Head-Rests of Dental Chairs, of which the following is a specification.

This applicationis divided from an invention described in my copending application for Letters Patent Ser. No. 723,276 for anatomical manikin heads, filed Oct. 1, 1912.

The attachment of a head articulator to the back seat of a dental chair has been described by Magnusson, U. S. Pat. No. 451,061 of April 28, 1891. A stationary attachment of a dental manikin head to a heavy base was also known heretofore. Neither of the described attachments, however, affords the practitioner an opportunity to do dental operative and prosthetic practice work under exactly the same conditions as though operating upon a human head while on the patients headrest of a dental chair. It has not been known heretofore to connect in an adjustable manner a dental manikin head with the patients headrest of a dental chair.

The special attachment of a dental manikin head to the patients headrest of dental chairs is the object of my present invention.

Figure 1 is a lateral view of a manikin head and the so-called Diamond dental chair showing the adjustment of-the head to the headrest of said chair. Fig. 2 is a back view of the same. Fig. 3 is a sectional view of the clamp plates A and A in connection with the screw spindle D. Fig. 4 shows the inner surface of plate A, and Fig. 5 shows the inner surface of plate A The connection of the head H with the patients headrest Y of the dental chair is made by a steel bracket B; this bracket is fastened at the skull base of the head. ltis swung in a suitable way around the central stein S of the headrest, and both bracket and stem can be clamped by means of my special adjustment. This adjustment may vary in shape and structure according to the construction of the various headrests of dental chairs without deviating from the spirit and Serial No. 774,339.

nature of my device as the principle in all cases remains the same. This special adjustment as shown in Figs. 1 and 2 and as illustrated in detail in Figs. 3, 4t, and 5, holds tightly in place, at the same time, both the central stem' S of the headrest of the dental chair, and also holds tightly the bracket B of the manikin head. This ad-- justmont is provided with a set screw, in this case being a-thumb screw D as shown in Figs. 1, 2 and 3. It is by means of this set thumb screw that the central stem S and the bracket B may be tightened or loosened in this adjustment. When tightened the manikin head is then rigidly held in place to the headrest of the dental chair. When the thumb screw is loosened the manikin head may be removed from its connection with the dental chair. in order that the central stem S and the bracket B may be rigidly held in this special adjustment, provision is made in this adjustment, by means of two grooves G and G (Figs. 9., 4 and 5) through which the stem S and the bracket B pass. These grooves G and G lie in the metallic plates A and A shown in Figs. 3, L and 5. These metallic plates A and A contain circular central perforations P and P (Figs. 4; and 5). The perforation P in the plate A is provided with a screw thread to receive the screw spindle U of the set screw D (Fig. The set thumb screw D shown in Figs. 1, 2 and 3 passes through. the perforation P of the plate A and fits the threaded perforation P of the plate A? The set screw D is turned in the thread until the head of the screw presses against the outer surface of the plate A. The inner surface of the plate A and the inner surface of the plate A facing each other, are provided each with two grooves G and i as noted above. Groove G of the plate A- will lie 0 posite toroove G of the late P g l A. Also groove G of the plate A will lie opposite to groove G of the plate A so that when groove G of the plate A. and groove G of the plate A come together, a cylin drical opening is formed. Another such cylindrical opening is formed when groove G of the plate A and groove G of the plate A are adjacent each other. Tt is through these cylindrical openings that the central I stem S on the left side and the bracket B on the right side, pass. Therefore, When the set thumbscreW- istightened and thevmanikin head is in its proper position, the plates A and A Will substantially touch, and rigidlyclamp thestem S and the bracket B by 'means of the cylindrical openings formed 7 self With the conditions under which a pa-' tients head is located in said patients headrest when the manikin head, adjusted to the patients headrest, follows all the movements to Which theiheadrest of thedental chair is subjected. The headrest Y is clamped againstthe back seatof a dental chainby Copies of thisnpatent may be obtained for five cents each, by addressing the Commissioner of-Patentaa means of the clamp lever L in the usual Way. An extensible section of the-seatback 7 can be settat a suitable height by means of having a bracket, a headrest of a dental chair having a central stem, and a clamp consisting of double grooved metal plates,"

said clamp being adj'ustableoto said bracket and stem-by means of a screw;

FANEUIL DVWEISSE, M; 1);, m n.

Witnesses:

H. SoHWErrzER, WM. H., KRUSE.

Washington, D. 0. 

